Endless-chain-cutter mortising-machine



No Model.) 2 Sheets-Sheet 1.

0. LOETSGHER. ENDLESS CHAIN CUTTER MORTISING MACHINE.

No. 559,781. Patented May 5, 1896.

(No Model.) 2 Sheets-Sheet 2.

O. LOETSOHER. ENDLESS CHAIN CUTTER MORTISING MACHINE.

Patented May 5,- 1896.

m n if UNITED STATES ATENT much.

CHRISTIAN nnnrs, CONNECTICUT.

LOETSCHER, OF DUBUQUE, IOXVA, ASSIGNOR, BY MESNE ASSIGN- TO THE NEXV BRITAIN MACHINE COMPANY, OF NEW BRITAIN,

ENDLESS-OHAlN-CUTTER MORTlSlNG-MACHINE.

SPECIFICATION forming part of Letter Applioationfilerl J 1111a 15, 1895.

T0 aZZ whom it may concern.-

.Be it known that I, CHRISTIAN LOETSOHER,

a citizen of the United States, residing at Dubuque, in the county of Dubuque and State of Iowa, have invented certain new and useful Improvements in Endless-Ohain-Cutter M01tising-Wlachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will onable others skilled in the art to which it appertains to make and use the same.

My invention relates to endless-chain-cutter mortising-machines, and has for its object to adapt a machine of this class to be used more especially in light-stock work, such as sashes, blinds, screens, and light furniture, where the mortise must not only be made accurate, but the edge of the mortise must not be injured by the action of the chain cutters in their upward movement, and, further, to provide means for so disposing of the chips that they will not interfere with the action of the machine or the full sight of the operator.

In describing my invention attention is called to the accompanying drawings, in which- Figure 1 is a perspective of the sash-mortising machine with a device for protecting the edge of the mortise in position. Fig. 2 is a front View of the machine. Fig. 3 is a front elevation of the device for protecting the edge of the mortise detached from the machine and the means for guiding the chips into the fan. Fig. a is a side elevation of Fig. 3. Fig. 5 is a face view of the adjustable arm, and Fig. 6 is a face view of the guide for the chips.

Like letters denote corresponding parts in all of the drawings.

A represents the frame of a mortising-machine, having the usual pulleys a b c, to which power is applied to operate the endless-chain cutter C. The table 13 is movable up and down, and upon it rests the work G to be mortised. In the back on of the table is a slot d, in which the protector for the mortise is guided both in its upward and downward movement.

The head 72. of the protector projects upon the front side of the each m, in front of the slot d. Through the outer end of the head s Patent No. 559,781, dated May 5, 1896.

Serial No. 552,969. (hi0 model.)

72. is a diagonal hole I, through which is inserted a bar F, the point-of which, when properly adjusted by means of a set-screw i, will be in such relative position to the chain as to rest on the edge of the mortise when the mor tise is being cut, as shown more fully in Fig. 3. At the lower end of the protector is fixed a weight E for holding the bar F firmly upon the edge of the mortise. An arm 6 is adj ustably secured to the cross-plate D by means of a screw f, inserted in the plate through the slot g in such arm, whereby the frame, and with it the bar F, can be adjusted higher or lower to meet the proper position on the work where the chain cutter enters the mortise. At the lower end of this arm (2 is a hook 01-, upon which the whole protector rests when not in operation and always prevents the protector from going lower than the desired position to which it is adjusted or set. To the cross-plate D is also fastened the cutterbar P, around which the endless-chain cutter travels. Secured to the side of the head h, adjacent to the chain-cutter teeth where they travel upward,is rigidly fastened a chip-guide Y H, which consists of a flat or longitudinallycurved plate running up to the hood S of the fan .I. The hood S extends over the fan J and has a wing 3 extending down one side to nearly the top of the guide H. Beneath the chain cutter is ad justably secured a table B to a plate 0, upon which is cast a lug 71). In the foot of the frame of the machine is pivoted a treadle Q, having an arm R running up through the lug 7.3. The upper end of the arm R is screw-threaded and provided with a nut Z. It will be seen that by pressure on the treadle Q the arm It will force the screw Z against the lug 7c, which will carry up the table with the work thereon to engagement with the chain cutter, and when released the table will come down of its own gravity.

The manner of operating my device is as follows: The work G is placed on the table and the table is adjusted horizontally for the proper width of the work. The bar F is adjusted vertically by loosening the screw t' and adjusting the arm e so that the stop a will limit the downward movement of the bar F. Then the bar F is further adjusted by the setwhere the teeth of the chain cutter leave the mortise in their upward movement, and protect the edge of the mortise from in any Way splintering' by the action of the teeth of the cutter. It will be seen that the whole of the protector, with the point of the bar F resting upon the edge of the mortiseat 75, will be carried'up'with the work and the table and will exert strong pressure at the edge 7; of the mortise. The chips from the chain cutter will be drawn out of the mortise by the cutterteeth and will be hurled rapidly against the i plate H at a very obtuse angle, and the plate H will guide them up into the hood S, where the fan J will dispose of them. When the mortise is completed, the table recedes or goes down till the chain has been withdrawn from the mortise, at which pointthe protector is dropped until it rests on the hook n, when it cannot further lower; but the table will continue to lower until the work may be released and new work put in.

work upon the table, it it be necessary to raise the table the protector will be carried up by the base of the slot (Z'striking against the under side of the head hand carrying all of the protector with it, It will be noticed that at all times the bar F ofthe protector maintains its relative position to the teeth of the chain where their upward movement approaches near the upper edge of the mortise,

and will automatically at all times protect the edge of the mortise from being splintered by the action of the teeth, and all of the chips will, as fast as made, be carried out of the way, along the guide H, into the hood S and disposed of by the fan J.

Having now described my invention and I its mode of operating, what I desire to secure I by Letters Patent is 1. In an endless-chain mortisin'g-maehine, the table, vertically movable, and provided with a slot through its rear edge, a means for raising the table, and the endless-chain eutter, combined with the head 72, having a diagonal opening through it, the bar F placed in the opening, and a weight applied to the head,

, substantially as shown.

2.- The vertically-movable table having a slotted back, the head, the protector extending at an angle through the head and adj ustable therein, and the weight secured to the head, combined with the slotted adjustable arm 6, provided with a hook it, which acts as a stop for the head, and the chip-guide secured to'the head, substantially as-described.

In testimony whereof I affix my signature in presence of two witnesses. When there is no I CHRISTIAN LOETSCl-IE'R.

'Witnesses:

M. M. CA'DY, J. E. Rossnn. 

